Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

ASME Section III Sight Glass

ASME Section III Sight Glass

ASME Section III Sight Glass


I know that ASME Section III isn't touched on very much here but on the off chance that someone has been involved, I have a question regarding it.

My company has to provide an ASME Section III, Class 3 (Subsection ND) sight glass for one of its nuclear clients. I've reviewed the materials section of ASME Section III and I can't find any place that permits the use of glass for a nuclear applications. Section 2000 of Subsection ND clearly states that pressure retaining materials must be from ASME Section IID, Table 1A, 1B or 3.

We can design the metallic portion of the sight flow indicator. My question is in regards to the glass itself. Does anyone know how this could be designed and be in compliance with Section III, Subsection ND? There are companies out there doing it (Rolls Royce as an example), but I have no idea how they're determining the thickness of the glass. Does the glass supplier have to be a Material Organization or possess a Quality System Certificate? Is there testing that has to be done on the glass to confirm it complies with ASME requirements? What are these tests?

If anyone has some experience in this area it would be greatly helpful!


RE: ASME Section III Sight Glass

flexy, you don't state what it is your company normally provides, but I infer it is not Code sight glasses. Can't you just buy one and supply it to your client?



The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: ASME Section III Sight Glass

We are frequently involved in Section III work. We need to understand how glass is permitted as a material inside a product we have to supply. We cannot buy the product. There other circumstances that prevent us from doing so.

RE: ASME Section III Sight Glass

flexy, I am not at all familiar with Sec III, or design of sight glasses, etc. but under Sec VIII, Div 1 there are provision for proof test of items whose allowable pressure cannot be adequately demonstrated by calculation. It's possible something similar exists in Sec III.

You may be able speed your design process by "reverse engineering" an existing product. As to the quality system side of things, I cannot offer anything.



The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: ASME Section III Sight Glass

Thanks Mike.

RE: ASME Section III Sight Glass

Sure, sorry I can't offer more.

The problem with sloppy work is that the supply FAR EXCEEDS the demand

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close